Could This Bible Verse Destroy Protestantism?

Protestants are often referred to as "Bible" Christians because - allegedly unlike Catholics - they have scriptural proof texts to support their unique beliefs. But what happens when Catholics show that there are also proof texts that seem to undermine foundational traditions of Protestantism?
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This has been my most viewed and most misunderstood video. Please read this article before wasting too much time in the comments: https://douglasbeaumont.com/2023/01/2... . Please watch the videos below before you quote Ephesians 2:8-9 or try to use the Thief on the Cross as a counter-example.

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Five Views on Justification (Book) - https://amzn.to/310o9Qx
The Bible Verse That Could Destroy Catholicism (Eph. 2:8-9) -    • Could This Bible Verse Destroy Cathol...  
Was the Thief on the Cross Saved by Faith Alone? -    • Was the Thief on the Cross Saved by F...  

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